1. Unité de Traitement de la Douleur de l'Enfant, Centre Léon Bérard, Institut d'Hématologie et d'Oncologie Pédiatrie, Lyon, France.
2. Department of Medical Oncology, Institut Curie, Paris, France.
3. Biostatistics and Epidemiology Unit, Institut Gustave Roussy, Villejuif, France.
4. Centre Léon Bérard, University Claude Bernard, Lyon, France.
5. Department of Cancer Medicine, Centre Hospitalo-Universitaire, Tours, France.
6. Department of Pediatric and Adolescent Hematology-Oncology, Hôpital Mère-Enfant, Nantes, France.
7. Department of Medical Oncology, Institut de Cancérologie de la Loire, Lucien Neuwirth, St Priest en Jarez, France.
8. Department of Medical Oncology, CHRU Jean Minjoz, Besançon, France.
9. Department of Medical Oncology, Centre Val d'Aurelle, Montpellier, France.
10. Department of Medical Oncology, Centre Eugène-Marquis, Rennes, France.
11. Medical Oncology Department, Centre Antoine Lacassagne, Nice, France.
12. Medical Oncology Department, Centre Francois Baclesse, Caen, France.
13. CHU Nantes Hôtel-Dieu/Laboratoire UMR1238 Phyos, Faculté de Médecine de Nantes, Nantes, France.
14. Medical Oncology Department, Centre Henri Becquerel, Rouen, France.
15. R&D Unicancer, Paris, France.
16. Pediatric Oncology Unit–Adolescents and Young Adults, Centre Oscar Lambret, Lille, France.
17. Department of Pediatric Oncology, Institut Gustave Roussy, Villejuif, France.
18. Biostatistics and Methodology Unit, Institut Gustave Roussy, Villejuif, France.